Patent US772944A successfully refreshed from Google Patents.
US772944A
Expired / Lapsed
US
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Electrical testing apparatus.
Assignee: KEYSTONE TELEPHONE Co
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Filing: 1902-11-19
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Granted: 1904-10-25
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Expires: 1922-11-19
Abstract
No abstract record available.
Inventors
- 👤 William Joseph Kyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:28
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1907-10-25 | 1908-04-25 | 1908-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-10-25 | 1912-04-25 | 1912-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-10-25 | 1916-04-25 | 1916-10-25 | $7700.00 | Window Closed / Lapsed |